Geithner had urged the world's leading finance ministers to take strong action to ensure emerging markets nations allow their currency to rise in value in line with the free market.

The worry is that if such currency manipulation continues, it could wreak havoc on international trade.

He insisted that "countries that have traditionally run large trade and current account surpluses" -- which China has done -- needed to move "away from export dependence and toward stronger domestic demand led growth."

He said rich countries like the United States needed to play their part too by saving, investing and exporting more.

He was speaking at a meeting of finance ministers of the G-20 group of nations. Their two-day meeting wrapped up Saturday in Gyeongju, South Korea, with the ministers pledging not to engage in currency wars.

Geithner then flew on to China, where he met Wang at the Qingdao Airport.

They also discussed plans for the G-20 leaders meeting in Seoul, South Korea, next month, the Americans said.

In the G-20 finance ministers' closing statement, they said they would "move towards more market determined exchange rate systems that reflect underlying economic fundamentals and refrain from competitive devaluation of currencies."

The ministers added that the G-20 member nations would "continue to resist all forms of protectionist measures and seek to make significant progress to further reduce barriers to trade."

The G-20 stopped short of outright banning currency manipulation though.

While that's slower than in previous quarters, it is still far higher than the growth rates of the United States, Japan and nations in Europe.

China's central bank also announced earlier this week that it was raising a key interest rate for the first time in nearly three years.

That comes at a time when many expect the Federal Reserve to soon announce more details about how it intends to further ease its own monetary policies.

In a nod to the increased economic clout of China and other emerging markets, such as Brazil, India and Russia, the G-20 ministers also announced a deal Saturday that would give emerging markets countries more seats on the board of the International Monetary Fund.

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